June 2012 Celestial Events

June 5: Venus crosses the face of the sun for a very rare transit. This should not be viewed without the proper filter: number 14 welders glass. The next one occurs on December 10, 2117, but it won't be visible from the East Coast of the US.

June 14: Earliest sunrise for observers at 40º N latitude.

June 18, 5:30 a.m.: Thin crescent Moon lies to the lower left of Venus in the east-northeast

June 20, 7:09 p.m.: Summer solstice

June 21, 9:30 p.m.:  Crescent Moon, Mercury, the bright stars Pollux and Castor appear in a row above the west-northwest horizon. 

June 27: Latest sunset for observers at 40º N latitude.

Second half of June: This will be a good time to view Mercury low in the west-northwest at 9:30 p.m. The planet will be to the left of the stars Castor and Pollux. Binoculars will be helpful picking out the little planet in the bright twilight.


Such is our view from Earth...

The Crescent of Venus

Look to the west-northwest at 9 p.m. for a starlike object just above the horizon. That is no star; that is Venus.

At 28 million miles, it is near its closest approach on June 5, and, consequently, Venus shows a relatively large angular size in the sky. Use binoculars to spy its thin crescent phase. If the planet's glare is too great, wear sunglasses. A good digital camera on full zoom should be able to pick up the crescent, as well. In a few days, Venus will be lost in the bright evening twilight, next to be found crossing the solar face on the evening of June 5.

Such is our view from Earth...

A ghostly crescent Moon joins Venus

If you have clear skies, look to the west-northwest tomorrow night (Tuesday) thirty minutes after sunset. The very thin crescent mMon, after having slid across the face of the sun yesterday, hovers above the ridge lines as a ghostly image. Next to it lies bright point of Venus. Use binoculars for an easier, better view.

Such is our view from Earth...

Annular Eclipse? Not for us!

On Sunday May 20, the sun becomes partially eclipsed by the Moon beginning as the sun sets. While the eclipse will be missed completely by Virginia observers, those farther west will see at least some of the event. For observers in parts of northern California, Nevada, Utah, Arizona, New Mexico, and west Texas, an annular eclipse just might be witnessed. This special type of partial solar eclipse happens when the whole moon crosses directly in front of the sun, which normally gives a total solar eclipse. This time, however, the moon is near apogee, i.e., in its farthest point from the Earth, and therefore, appears smaller in the sky than usual. Since it is smaller, it does't cover the full face of the sun, but leaves a ring of brilliant sunlight streaming around it. This is an "annular eclipse." As with other partial solar eclipses, do not observe it without the proper solar filters!

Such is our view from Earth...

Venus: the beginning of the end

Brilliant Venus is sinking fast in the west-northwest right after sunset. The planet, which has dominated our western sky over the past few months, ends its reign in just a few weeks as it approaches the sun. Since Venus orbits closer to the sun than the Earth, occasionally it moves between the sun and the Earth. This happens on June 5.

Be sure to watch this beacon over the next few weeks as it drops closer to the set sun each evening. Venus' evening reign is ending.

Such is our view from Earth...

May Celestial Events

Celestial Events: May 2012

April 30: Venus at greatest brilliancy. Magnitude -4.5

April 30: First quarter Moon forms a tight triangle with Regulus and Mars.  

May 20: Annular eclipse of the sun. Begins at sunset here.

May 22: Venus is next to the thin crescent moon in the bright evening twilight at 9:00 p.m.

May 31: Gibbous moon forms a straight line with Saturn and Spica.

Such is our view from Earth...

Moon meets Venus in Taurus

The crescent moon entered the constellation Taurus to join Venus in our early evening sky tonight. This magical scene was made even more mysterious by fast passing clouds riding the latest front.

Tomorrow night, the moon will be higher in the sky, farther from Venus.  Over the next few weeks, Venus drops closer to the horizon and closer to the sun as it catches the Earth. It eventually passes exactly between the Earth and the sun on June 5. Then the brilliant planet enters our morning sky.

Such is our view from Earth...